RU2174859C1 - Device for cleaning bulk filters - Google Patents

Abstract

FIELD: public services; treatment of sewage cleaning filter media of gravitational filters. SUBSTANCE: proposed device has the following components located above filter reservoir: electric drive with hauling chain, tightener and at least two support carriages designed for reciprocating over guides. These carriages are interconnected by means of signal cantilever; their wheels moving over guides are provided with flanges. Device is also provided with flushing pipe arranged inside filter reservoir; this pipe has holes for escape of water jets under pressure of 4 to 5 atm. This pipe is connected with cantilever by means of at least two metal rods, thus forming rigid three-dimensional structure. Holes in flushing pipe are located at pitch of 250 to 350 mm; at least each third hole is communicated with inlet of spraying unit secured rotatably on flushing pipe and provided with tangential passages located in plane parallel to surface of loading. EFFECT: low cost of water treatment. 7 cl, 1 dwg, 1 tbl

Description

 The invention relates to the field of public utilities, in particular to the field of wastewater treatment, as well as tap water, and can be used to clean the load of gravity filters.

 It is known (SU, copyright certificate 562512, C 02 F 1/52, 1977) a device for washing a bulk filter, which is a pipe system located under the bulk filter. If the bulk filter is contaminated, flushing water is supplied through the pipe system and the contamination is washed out of the bulk filter. Wash water along with impurities is removed through the fan system.

 It is known (SU, copyright certificate 1328305, 01 D 21/08, 1987) a device for cleaning bulk filter material. The device is a system of pipes lowered into bulk material. Periodically, compressed air is passed through the specified pipe system, loosening the outer layer of bulk material and washing away contaminants from it. After supplying compressed air through the fan system, the surface layer of the treated water is removed along with the impurities.

 The disadvantage of both of these technical solutions should recognize the possibility of contamination of the outlet openings of the pipes, which will not allow for the effective cleaning of bulk material.

 A device for cleaning slow water filters (SU, copyright 141440, C 02 F 1/52, 1951) is also known. The specified device contains a hydraulic elevator, pump, roller and scraper, and in order to mechanize the process, the device combines a scraper for loosening and removing a layer of contaminated sand with a hydraulic elevator to remove impurities outside the filter and a roller for smoothing the surface of the sand. The device also contains two side racks connected to the knife and the limiter, equipped with teeth designed to loosen the dirt on the surface of the sand. Side racks cut into the sand and limit the space on which the sand is washed. An additional roller is mounted on the side walls, which is designed to level and roll sand after washing when manually moving the device along the sand. Inside the metal case, formed by two side walls, a knife and a stopper, there is a perforated pipe having two systems of holes, one of which is directed vertically downward, and the other at an angle to the knife to flush out contaminants. Source water enters both the perforated pipe and the nozzle of the hydraulic elevator. This allows the hydraulic elevator to suck in dirty water through the slot hole and remove it from the filter tank.

 A disadvantage of the known device should recognize the need for manual movement, as well as the possibility of failure of the dirty water removal system due to clogging of the hydraulic elevator. In addition, the device is suitable for working only with sand as a filter element, since when using heavier backfill (marble chips), loosening it in this way with the removal of contaminants is impossible.

 A device for cleaning bulk filters (SU, copyright certificate 1775129, 01 D 24/46, 1990), comprising an electric drive with a traction chain with a tensioning mechanism located above the filter reservoir, mounted with the possibility of reciprocating movement along the supporting-running guide a cart to which a means for supplying washing water is supplied and a horizontal distribution pipe for supplying washing water to the filter charge is connected.

 A device is known (RU, application 2000111760/12, publ. 11/27/2000), containing located above the filter reservoir electric drive with a traction chain, a tension mechanism of the traction chain, at least two supporting-running trolleys, made with the possibility of the return translational movement along the guides, preferably made in the form of channels, moreover, these trolleys are interconnected by a console, and their wheels moving along the guides contain flanges, a corrugated hose mounted on the flushing pipe to ensure HAND supplying water for washing. Inside the filter tank, the installation contains the specified flushing pipe, preferably with a diameter of 100 mm, in which holes are made mainly at an angle to the horizontal, preferably with a diameter of 6 to 12 mm, providing water jets under pressure of 4 to 5 atm., At least two metal rods connecting flushing tube with console in one rigid spatial structure, preferably in the form of a rectangle.

 A disadvantage of the known device should be recognized as excessive mixing of the filter load, leading not only to the removal of sludge from the loading surface, but also to a partial removal of the load itself.

 The technical problem solved by the present invention is to develop a system for removing contaminants from the surface of the bulk material of the filter.

 The technical result obtained by the implementation of the invention is to reduce the entrainment of the filter load while reducing the amount of water used for washing the filter, which reduces the cost of purified water.

 The specified technical result is achieved using the following design. The developed device for cleaning bulk filters contains an electric drive located above the filter tank with a traction chain and a mechanism for its tension, mounted with the possibility of reciprocating movement along the guide at least two supporting-running trolleys, to which a means for supplying washing water is supplied. The indicated trolleys are interconnected by a console, and their wheels moving along the guides contain flanges. To these trolleys a horizontal distribution pipe is connected for supplying washing water to the filter load, on which a corrugated hose is fixed, designed to supply water for washing. Inside the filter tank, the installation contains the indicated flushing pipe, in which openings are made, ensuring the outflow of water jets under a pressure of 4 to 5 atm., And at least two metal rods connecting the flushing pipe to the console in one rigid spatial design. These holes are located along the wash pipe with a pitch of 250 - 350 mm, and at least every third hole is in communication with the entrance mounted on the wash pipe with the possibility of rotation of the spray means with tangentially located output channels. The plane in which these exits are located is parallel to the loading surface.

 In the future, the invention will be disclosed using graphic materials (see Fig. 1). In FIG. 1, the following designations are accepted: filter tank 1, granular load 2, console 3, support trolley 4, guides 5, corrugated hose 6, flushing pipe 7, traction 8, spraying means 9.

 The device operates as follows.

 After prolonged operation of the bulk filter when silting a granular load, leading to a decrease in the speed of passage of the purified water through load 2, a drive (not shown) is turned on. The drive initiates the movement of the traction chain (not shown), tensioned using a tension mechanism (not shown) and connected by a flexible connection to the metal console 3. Since the traction chain has a closed loop, then when it moves, the console 3 connected to it makes a reciprocating movement. When the console 3 moves, the supporting trolleys 4 carry out reciprocating movement along the guides 5. When moving the indicated supporting trolleys 4, the flanges (not shown) of their wheels do not allow the wheels to move horizontally from the guides 5. The flushing pipe 7 connected by rods 8 with the console 3 is rigidly connected and placed in the tank 1 above the load 2, repeats the reciprocating movements of the console 3. Behind the flushing pipe 7, the corrugated hose 6 also moves.

 The console 3 and the flushing tube 7 are supported by the support trolleys 4, the chassis of which is designed to move along the guides 5, has side flanges that ensure the stable movement of the trolleys 4 along the respective guides 5, which ensures that there is no case of jamming and skewing of the chassis.

 The corrugated hose 6 under pressure up to 6 atm serves water in the wash pipe 7. When the washing pipe 7 is reciprocated under the influence of rods 8 after the console 3 is moved, washing water flows out through the openings in the washing pipe 7 with jets at a pressure of 4 - 5 atm, loosening the charge 2, and through spraying means with tangentially located outlets ( type "Rocket wheel") - water, loosening sludge from the loading surface. Wash water with impurities is removed through a drain (not shown) made in the lower part of the wall of the tank 1.

 The applicant notes that it is the use of holes located along the wash pipe with a pitch of 250 - 350 mm, and provided that at least every third hole is connected to the inlet of the spraying means mounted on the wash pipe and made to rotate with tangentially located outlet channels, and the plane in which these outputs are located is parallel to the loading plane, which allows to achieve the specified technical result.

 The advantages of this design can be judged by laboratory analysis of the composition of the wash water (see table). The flushing time, the flushing intensity and the amount of flushing water are limited by the volume of the storage tank.

 The proposed design of the surface washing mechanism is simple and reliable in operation, since it virtually eliminates the possibility of distortion of the washing means during the cleaning process due to the presence of two trolleys, reduces material costs and the time spent on repair work due to the availability of washing water drainage means and the absence of losses loading, the content of suspended particles in the outlet water (filtrate) is significantly lower on filters equipped with a new design mechanism, the content of dissolved acid Orod in the wash water is greater on the filters with the mechanism of the new design.

Claims (7)

 1. A device for cleaning bulk filters, containing located above the filter tank an electric drive with a traction chain and a mechanism for its tension, installed with the possibility of reciprocating movement along the guide at least two supporting-running trolleys, to which a means for supplying washing water, moreover, these trolleys are interconnected by a console, and their wheels moving along the guides contain flanges, a horizontal distribution pipe is connected to the indicated trolleys for I rinse water supply, on which a corrugated hose is fixed, designed to supply rinse water, the indicated rinse pipe is located inside the filter tank, in which holes are made that allow water jets to flow out under a pressure of 4 to 5 atm and at least two metal rods connecting a flushing pipe with a console in one rigid spatial design, characterized in that said holes are arranged along the washing pipe with a pitch of 250-350 mm, with at least every third hole communicating with stroke spray means mounted on the flushing conduit is rotatably and having a tangential channels disposed in a plane parallel to the charging surface.  2. The device according to claim 1, characterized in that the spraying means are distributed evenly over the wash tube.  3. The device according to p. 1, characterized in that the guides are made in the form of channels.  4. The device according to claim 1, characterized in that the flushing pipe is made with a diameter of 100 mm  5. The device according to claim 1, characterized in that the holes in the pipe not connected to the spraying means are made at an angle to the horizontal.  6. The device according to claim 1, characterized in that the holes in the pipe have a size of 6 -12 mm  7. The device according to claim 1, characterized in that the structure formed by the console, rods and flushing pipe is made in the form of a rectangle.

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